Purchased iTunes Video protected by DRM
When you purchased movies from iTunes, you will find two limitations about playing your videos.
The first starts once you play the rented movie for the first time. After hitting play, you have just 24 hours to finish watching the movie. If you don't finish watching it in that time, the movie will expire and be unplayable.
The second time limit is how long you have to watch it the first time after download. In this case, you have 30 days from the day you rented the movie to watch it. If you don't watch the movie in that 30 - day, your rental will expire.
What is Drm and iTunes?
DRM (Digital Rights Management) is a broad term used to describe a few techniques for restricting the free use and transfer of digital media like videos, movies, music files, games.
iTunes is a versatile music playing program for both Windows and Mac OS. With this media player, you can also purchase songs/video from online iTunes music store.